CN206627597U - One kind detection USB socket water inlet open circuit potential - Google Patents
One kind detection USB socket water inlet open circuit potential Download PDFInfo
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- CN206627597U CN206627597U CN201720208815.8U CN201720208815U CN206627597U CN 206627597 U CN206627597 U CN 206627597U CN 201720208815 U CN201720208815 U CN 201720208815U CN 206627597 U CN206627597 U CN 206627597U
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Abstract
The utility model embodiment provides a kind of detection USB socket water inlet open circuit potential, is related to electric detective technology field.The circuit includes, USB socket, processor and first resistor；The voltage pin of the processor is connected by the first resistor with the first pin of the USB socket；First pin is non-GND pins；The voltage detecting pin of the processor is connected with the second pin of the USB socket, and the test voltage value of the voltage detecting pin is Vin；Second pin is non-GND pins；Intake when between first pin and second pin, and/or, when impurity be present, the Vin becomes big.By detecting the change of the Vin, it can know whether the pin of the USB socket either enters steam or impurity between the pin of the USB socket over the ground；If into steam or impurity, the Vin sends corresponding change, reminds user to carry out the cleaning of steam or impurity.
Description
Technical field
Electric detective technology field is the utility model is related to, more particularly to one kind detection USB socket water inlet open circuit potential.
Background technology
USB (Universal Serial Bus, USB) interface is a kind of external bus standard, for specification
Computer and external equipment are connected and communicate with.USB interface has the characteristics of plug and play and hot plug.
On mobile terminals, USB interface is generally used for charging, OTG (On-The-Go, is mainly used in a variety of set
Connection between standby or mobile device, carry out data exchange), the function such as data transfer；And USB interface-based socket, either
Micro-B mouths or type-C mouths, pin pin (pin of USB socket) are all direct and air contacts in Specification Design.
Pin pin and air contact, it can enter the materials such as steam or impurity, cause pin pin over the ground or impedance between pin
Diminish, make the function of USB interface that exception occur, for example automatically into OTG, the exception that charges or be unable to identification data transmission.
Utility model content
In view of the above problems, it is proposed that the utility model embodiment provides one kind and overcomes above mentioned problem or at least in part
A kind of detection USB socket water inlet open circuit potential to solve the above problems.
In order to solve the above problems, the utility model embodiment discloses a kind of detection USB socket water inlet open circuit potential, bag
Include：USB socket, processor and first resistor；
The voltage pin of the processor is connected by the first resistor with the first pin of the USB socket；It is described
First pin is non-GND pins；
The voltage detecting pin of the processor is connected with the second pin of the USB socket, the voltage detecting pin
Test voltage value be Vin；Second pin is non-GND pins；
Intake when between first pin and second pin, and/or, when impurity be present, the Vin becomes big.
Preferably, according to USB socket water inlet open circuit potential, in addition to：
Voltage pin output voltage is through the second resistance between first resistor, the first pin and the second pin and the voltage
After the input internal resistance for detecting pin, the electric current in circuit is the first electric current；
The Vin is the input internal resistance and the product of first electric current.
Preferably, according to USB socket water inlet open circuit potential, in addition to：
Intake when between first pin and second pin, and/or, when impurity be present, the second resistance and institute
The resistance into water is stated, and/or, the resistor coupled in parallel that impurity be present, form 3rd resistor；Wherein, the 3rd resistor is less than
The second resistance；
First electric current of the voltage pin output voltage through first resistor, 3rd resistor and the voltage detecting pin becomes big；
The Vin becomes big.
The utility model embodiment also provide it is a kind of overcome above mentioned problem or solve the above problems at least in part one
Kind detection USB socket water inlet open circuit potential, including：USB socket, processor and first resistor；
The voltage pin of the processor is connected by first resistor with the first pin of the USB socket；Described first
Pin is non-GND pins；
The voltage detecting pin of the processor is connected with the first pin of the USB socket, the voltage detecting pin
Test voltage value be Vin；Second pin is non-GND pins；
Intake when between first pin and GND, and/or, when impurity be present, the Vin diminishes.
Preferably, according to USB socket water inlet open circuit potential, in addition to：
Resistance to earth and the voltage detecting pin of the voltage pin output voltage through first resistor, first pin
After inputting internal resistance the 4th resistance in parallel, the electric current in circuit is the second electric current；
The Vin is the product of the 4th resistance and second electric current.
Preferably, according to USB socket water inlet open circuit potential, in addition to：
Intake when between first pin and the GND, and/or, when impurity be present, the resistance to earth and the water inlet
Resistance, and/or, the resistor coupled in parallel that impurity be present, form the 5th resistance；Wherein, the 5th resistance is less than described the
Four resistance；
Second electric current becomes big, and the Vin diminishes.
The utility model embodiment includes advantages below：
By detecting the change of the Vin, it can know the pin of the USB socket over the ground or the USB socket
Whether enter steam or impurity between pin；If into steam or impurity, the Vin sends corresponding change, reminds
User carries out the cleaning of steam or impurity.
Brief description of the drawings
Fig. 1 is a kind of structured flowchart for detecting USB socket and entering aqueous corrosion of the present utility model；
Fig. 2 is a kind of circuit diagram for detecting USB socket and entering aqueous corrosion of the present utility model；
Fig. 3 is the structured flowchart that another detection USB socket of the present utility model enters aqueous corrosion；
Fig. 4 is the circuit diagram that another detection USB socket of the present utility model enters aqueous corrosion.
Embodiment
To enable above-mentioned purpose of the present utility model, feature and advantage more obvious understandable, below in conjunction with the accompanying drawings and tool
Body embodiment is described in further detail to the utility model.Obviously, described embodiment is only the utility model
Part of the embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belong to the scope of the utility model protection.
Embodiment one
Reference picture 1, show a kind of structured flowchart for detecting USB socket and entering aqueous corrosion of the present utility model.
As shown in figure 1, the detection USB socket water inlet open circuit potential, including：USB socket 110, processor 130 and first
Resistance 120；
The voltage pin 131 of the processor 130 passes through the first resistor 120 and the first pipe of the USB socket 110
Pin 111 is connected；First pin 111 is non-GND pins；
The voltage pin 131 can be the GPIO interface of the processor 130, and the GPIO interface refers to General
Purpose Input Output (universal input/output) are referred to as GPIO.
The GND pins are the pin being connected with the earth signal of the circuit, and non-GND pins refer to and voltage signal, number
It is believed that number connected pin.
The voltage detecting pin 132 of the processor 130 is connected with the second pin 113 of the USB socket 110, described
The test voltage value of voltage detecting pin 132 is Vin；Second pin is non-GND pins；
Intake when between first pin 111 and second pin 113, and/or, when impurity be present, the Vin becomes
Greatly.
The USB socket can apply to mobile terminal, computer and other have and the electronics of external progress data interaction
On product；The number of pin of the USB socket can be 4pin, 5pin or 20pin etc..The utility model is inserted to the USB
The application scenarios of seat and the number of pin of USB socket are without limiting.
Preferably, in the circuit, the 131 external output voltage of voltage pin of the processor 130, for example, the electricity
Pressure pipe pin 131 externally exports 5.00V voltages.
Second resistance between the voltage pin and the first resistor 120, the first pin 111 and the second pin 113
112 and the voltage detecting pin 132 input internal resistance 133 composition detection circuit, wherein, input internal resistance 133 partial pressure be
Vin, the input internal resistance 133 are connected with GND.The electric current of the detection circuit for voltage pin voltage divided by first resistor 120,
Second resistance 112, the input sum of internal resistance 133；The Vin is that the electric current of the detection circuit is multiplied by the input internal resistance.
For example, the voltage pin 131 externally exports 5.00V voltages, the first resistor 120 is 1M, second electricity
Resistance 112 is 100M, and the input internal resistance 133 is 1M, then the electric current of the detection circuit is 0.05uA；The Vin is 0.05V.
In practice, equivalent to short circuit between first pin 111 and second pin 113, then the Vin is 0.
Intake when between first pin 111 and second pin 113, and/or, when impurity be present, second electricity
The resistance of resistance 112 and the water inlet, and/or, the resistor coupled in parallel that impurity be present, form 3rd resistor；Wherein, the described 3rd
Resistance is less than the second resistance 112；
In input of the output voltage of voltage pin 131 through first resistor 120,3rd resistor and the voltage detecting pin
After resistance, electric current becomes big；The Vin becomes big.
When entering steam between first pin 111 and second pin 113, first pin and described the
Two pins are equivalent to short circuit, and according to parallel circuit principle, then the 3rd resistor is 0；For example, the voltage pin 131 is external
5V voltages are exported, the first resistor 120 is 1M, and the second resistance 112 is 100M, and the input internal resistance 133 is 1M；Due to
Into after steam, the electric current of the circuit is 2.50uA；Vin voltages are 2.50V；Compared with voltage when being introduced into steam,
Magnitude of voltage 0 becomes big.
Preferably, level comparator, the reference voltage V of the level comparator can be set in processor 130
(ref), the Vin is the input voltage of the level comparator；When the Vin is more than the V (ref), the level ratio
Alarm signal is sent to the warning end of the processor compared with device, user understands that the USB socket 110 is abnormal by alarm signal,
Need to be cleared up.
When entering impurity between first pin 111 and second pin 113, the resistance of the impurity with it is described
Second resistance 112 carries out parallel connection, obtains 3rd resistor.For example, the voltage pin 131 externally exports 5V voltages, described first
Resistance 120 is 1M, and the second resistance 112 is 100M, and the resistance of the impurity is 1M, and the input internal resistance 133 is 1M；Then institute
The electric current for stating circuit is 1.67uA；Vin voltages are 1.67V；Compared with voltage when being introduced into impurity, magnitude of voltage becomes big.
Preferably, light emitting diode and its peripheral resistance can be placed at the voltage detecting pin 132, forms voltage
Judge module so that when Vin is more than V (ref), then light emitting diode is lighted, prompt USB socket 110 described in user abnormal, it is necessary to
Cleared up.
When USB line is inserted the USB socket 110 by user, the voltage pin 131 is closed, and stops inserting the USB
Pin power supply on seat 110.
Described abnormal by detecting Vin, the mode alerted to user is not limited to the above embodiments.
The practical circuit diagram of the present embodiment is illustrated in figure 2, the GPIO1 pins of processor are equivalent to voltage pin, through
One resistance R1 is to pull-up voltage on the first pin pin1 and the second pin pin2 offers；Wherein, Rx is the first pin pin1 and second
Pin pin2 resistance, it is second resistance；Processor ADC pins are voltage detecting pin, and the voltage on voltage detecting pin is
Vin；Be present input internal resistance in ADC pins, do not embodied in actual circuit.
By detecting the change of the Vin, it can know the pin of the USB socket over the ground or the USB socket
Whether enter steam or impurity between pin；If into steam or impurity, the Vin sends corresponding change, reminds
User carries out the cleaning of steam or impurity.
Embodiment two
Reference picture 3, show a kind of structured flowchart for detecting USB socket and entering aqueous corrosion of the present utility model.
As shown in figure 3, the detection USB socket water inlet open circuit potential, including：USB socket 210, processor 230 and first
Resistance 220；
The voltage pin 231 of the processor passes through first resistor 220 and the phase of the first pin 211 of the USB socket 210
Even；First pin 211 is non-GND pins；
The voltage pin 231 can be the GPIO interface of the processor 130, and the GPIO interface refers to General
Purpose Input Output (universal input/output) are referred to as GPIO.
The GND pins are the pin being connected with the earth signal of the circuit, and non-GND pins refer to and voltage signal, number
It is believed that number connected pin.
The voltage detecting pin 232 of the processor 230 is connected with the first pin 211 of the USB socket 210, described
The test voltage value of voltage detecting pin 232 is Vin；
Intake when between first pin 211 and GND, and/or, when impurity be present, the Vin diminishes.
The USB socket can apply to mobile terminal, computer and other have and the electronics of external progress data interaction
On product；The number of pin of the USB socket can be 4pin, 5pin or 20pin etc..The utility model is inserted to the USB
The application scenarios of seat and the number of pin of USB socket are without limiting.
Preferably, in the circuit, the 131 external output voltage of voltage pin of the processor 130, for example, the electricity
Pressure pipe pin 131 externally exports 5.00V voltages.
The voltage pin and the first resistor 220, resistance to earth 212 and the voltage detecting of the first pin 211
Composition detection circuit after 233 the 4th resistance in parallel of input internal resistance of pin 232, wherein, the partial pressure of input internal resistance 233 is Vin,
The input internal resistance 233 is connected with GND, and resistance to earth 212 is connected with GND.Second electric current of the detection circuit is voltage pin
Voltage divided by the resistance sum of first resistor 220 and the 4th；The Vin is that the electric current of the detection circuit is multiplied by the 4th resistance
233。
For example, the voltage pin 231 externally exports 5.00V voltages, the first resistor 120 is 1M, described electric over the ground
Resistance 212 is 1M, and the input internal resistance 233 is 1M, then the 4th resistance is 0.50M；The electric current of the detection circuit is 3.33uA；It is described
Vin is 1.67V.
In practice, between first pin 211 and GND equivalent to open circuit, then the resistance to earth 212 is infinite
Greatly；Obtained equivalent to the Vin according to first resistor 220 and the bleeder circuit of input internal resistance 233, then in practice, the 4th resistance
As described input resistance 233.
For example, the voltage pin 231 externally exports 5.00V voltages, the first resistor 120 is 1M, in the input
Resistance 233 is 1M, then the 4th resistance is 1M；The electric current of the detection circuit is 2.50uA；The Vin is 2.50V.
Intake when between first pin and the GND, and/or, when impurity be present, the 4th resistance and the water inlet
Resistance, and/or, the resistor coupled in parallel that impurity be present, form the 5th resistance；Wherein, the 5th resistance is less than described the
Four resistance；
Second electric current becomes big, and the Vin is the product of the 5th resistance and the second circuit, and the Vin becomes
It is small.
When being intake between first pin 211 and the GND, because the resistance of the water inlet is 0, according to parallel resistance
Principle, then the 5th resistance be 0；Then the Vin is 0.
For example, the voltage pin 231 externally exports 5.00V voltages, the first resistor 220 is 1M, described electric over the ground
Hinder for infinity, the input internal resistance 233 is 1M, and according to parallel circuit principle, the 4th resistance is 1M, the 5th resistance
For 0, then the electric current of the detection circuit is 5uA；The Vin is 0；Compared with voltage 2.50V when being introduced into steam, magnitude of voltage becomes
It is small.
Preferably, level comparator, the reference voltage V of the level comparator can be set in processor 230
(ref), the Vin is the input voltage of the level comparator；When the Vin is less than the V (ref), the level ratio
Alarm signal is sent to the warning end of the processor compared with device, user understands that the USB socket 210 is abnormal by alarm signal,
Need to be cleared up.
When entering impurity between first pin 211 and the GND, the resistance of the impurity and the resistance to earth
212nd, the input internal resistance 233 carries out parallel connection, obtains the 5th resistance.For example, the voltage pin 231 externally exports 5V voltages,
The first resistor 220 is 1M, and the resistance to earth 212 is infinity, and the resistance of the impurity is 1M, the input internal resistance
133 be 1M；Then the 4th resistance is the input internal resistance 133, i.e., described 4th resistance is 1M, and the 5th resistance is
0.50M；Second electric current of the circuit is 3.33uA；Vin voltages are 1.67V；Voltage 2.50V phases during with being introduced into impurity
Than magnitude of voltage diminishes.
Preferably, light emitting diode and its peripheral resistance can be placed at the voltage detecting pin 232, forms voltage
Judge module so that when Vin is less than V (ref), then light emitting diode lights (or being gone out by bright change), prompts USB socket described in user
210 is abnormal, it is necessary to be cleared up.
Described abnormal by detecting Vin, the mode alerted to user is not limited to the above embodiments.
When USB line is inserted the USB socket 110 by user, the voltage pin 131 is closed, and stops inserting the USB
Pin power supply on seat 110.
The practical circuit diagram of the present embodiment is illustrated in figure 4, the GPIO1 pins of processor are equivalent to voltage pin, through
One resistance R1 is to pull-up voltage in the first pin pin1 offers；Wherein, Rx is the first pin pin1 resistance to earth；Processor ADC
Pin is voltage detecting pin, and the voltage on voltage detecting pin is Vin；ADC pins, which exist, inputs internal resistance, in actual circuit not
Embody.
By detecting the change of the Vin, it can know the pin of the USB socket over the ground or the USB socket
Whether enter steam or impurity between pin；If into steam or impurity, the Vin sends corresponding change, reminds
User carries out the cleaning of steam or impurity.
Although having been described for the preferred embodiment of the utility model embodiment, those skilled in the art once learn
Basic creative concept, then can make other change and modification to these embodiments.So appended claims are intended to solve
It is interpreted as including preferred embodiment and falls into having altered and changing for the utility model embodiment scope.
Finally, it is to be noted that, herein, such as first and second or the like relational terms be used merely to by
One entity or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or operation
Between any this actual relation or order be present.Moreover, term " comprising ", "comprising" or its any other variant meaning
Covering including for nonexcludability, so that process, method, article or terminal device including a series of elements are not only wrapped
Those key elements, but also the other element including being not expressly set out are included, or is also included for this process, method, article
Or the key element that terminal device is intrinsic.In the absence of more restrictions, wanted by what sentence "including a ..." limited
Element, it is not excluded that other identical element in the process including the key element, method, article or terminal device also be present.
Above to a kind of detection USB socket water inlet open circuit potential provided by the utility model, it is described in detail, this
Apply specific case in text to be set forth principle of the present utility model and embodiment, the explanation of above example is
It is used to help understand method and its core concept of the present utility model；Meanwhile for those of ordinary skill in the art, according to this
The thought of utility model, there will be changes in specific embodiments and applications, in summary, this specification content
It should not be construed as to limitation of the present utility model.
Claims (6)
1. one kind detection USB socket water inlet open circuit potential, including：USB socket, processor and first resistor；
The voltage pin of the processor is connected by the first resistor with the first pin of the USB socket；Described first
Pin is non-GND pins；
The voltage detecting pin of the processor is connected with the second pin of the USB socket, the survey of the voltage detecting pin
Examination magnitude of voltage is Vin；Second pin is non-GND pins；
Intake when between first pin and second pin, and/or, when impurity be present, the Vin becomes big.
2. circuit according to claim 1, it is characterised in that also include：
Voltage pin output voltage is through the second resistance between first resistor, the first pin and the second pin and the voltage detecting
After the input internal resistance of pin, the electric current in circuit is the first electric current；
The Vin is the input internal resistance and the product of first electric current.
3. circuit according to claim 2, it is characterised in that also include：
Intake when between first pin and second pin, and/or, when impurity be present, the second resistance with it is described enter
The resistance of water, and/or, the resistor coupled in parallel that impurity be present, form 3rd resistor；Wherein, the 3rd resistor is less than described
Second resistance；
First electric current of the voltage pin output voltage through first resistor, 3rd resistor and the voltage detecting pin becomes big；It is described
Vin becomes big.
4. one kind detection USB socket water inlet open circuit potential, including：USB socket, processor and first resistor；
The voltage pin of the processor is connected by first resistor with the first pin of the USB socket；First pin
For non-GND pins；
The voltage detecting pin of the processor is connected with the first pin of the USB socket, the survey of the voltage detecting pin
Examination magnitude of voltage is Vin；Second pin is non-GND pins；
Intake when between first pin and GND, and/or, when impurity be present, the Vin diminishes.
5. circuit according to claim 4, it is characterised in that also include：
Input of the voltage pin output voltage through first resistor, the resistance to earth and the voltage detecting pin of first pin
After internal resistance the 4th resistance in parallel, the electric current in circuit is the second electric current；
The Vin is the product of the 4th resistance and second electric current.
6. circuit according to claim 5, it is characterised in that also include：
Intake when between first pin and the GND, and/or, when impurity be present, the 4th resistance and the electricity of the water inlet
Resistance, and/or, the resistor coupled in parallel that impurity be present, form the 5th resistance；Wherein, the 5th resistance is less than the described 4th electricity
Resistance；
Second electric current becomes big, and the Vin is the product of the 5th resistance and the second circuit, and the Vin diminishes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720208815.8U CN206627597U (en) | 2017-03-04 | 2017-03-04 | One kind detection USB socket water inlet open circuit potential |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720208815.8U CN206627597U (en) | 2017-03-04 | 2017-03-04 | One kind detection USB socket water inlet open circuit potential |
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| CN206627597U true CN206627597U (en) | 2017-11-10 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108052424A (en) * | 2017-11-30 | 2018-05-18 | 深圳市万普拉斯科技有限公司 | OTG interfaces method for detecting abnormality, device, computer equipment and storage medium |
| CN108711719A (en) * | 2018-03-30 | 2018-10-26 | 联想(北京)有限公司 | A kind of connector and electronic equipment |
| CN110213686A (en) * | 2019-05-28 | 2019-09-06 | 维沃移动通信有限公司 | A kind of detection method and terminal of earphone socket |
| WO2020073253A1 (en) * | 2018-10-10 | 2020-04-16 | 华为技术有限公司 | Method, circuit and electronic device for detecting water immersion |
| CN111294699A (en) * | 2018-12-29 | 2020-06-16 | 展讯通信（深圳）有限公司 | Earphone detection method and device for preventing liquid misjudgment |
| WO2022022401A1 (en) * | 2020-07-31 | 2022-02-03 | 华为技术有限公司 | Method for detecting water ingress in usb interface, and electronic device |
-
2017
- 2017-03-04 CN CN201720208815.8U patent/CN206627597U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108052424A (en) * | 2017-11-30 | 2018-05-18 | 深圳市万普拉斯科技有限公司 | OTG interfaces method for detecting abnormality, device, computer equipment and storage medium |
| CN108711719A (en) * | 2018-03-30 | 2018-10-26 | 联想(北京)有限公司 | A kind of connector and electronic equipment |
| WO2020073253A1 (en) * | 2018-10-10 | 2020-04-16 | 华为技术有限公司 | Method, circuit and electronic device for detecting water immersion |
| US11566964B2 (en) | 2018-10-10 | 2023-01-31 | Huawei Technologies Co., Ltd. | Water ingress detection method and circuit, and electric device |
| CN111294699A (en) * | 2018-12-29 | 2020-06-16 | 展讯通信（深圳）有限公司 | Earphone detection method and device for preventing liquid misjudgment |
| CN111294699B (en) * | 2018-12-29 | 2021-12-03 | 展讯通信（深圳）有限公司 | Earphone detection method and device for preventing liquid misjudgment |
| CN110213686A (en) * | 2019-05-28 | 2019-09-06 | 维沃移动通信有限公司 | A kind of detection method and terminal of earphone socket |
| WO2022022401A1 (en) * | 2020-07-31 | 2022-02-03 | 华为技术有限公司 | Method for detecting water ingress in usb interface, and electronic device |
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